%0 Journal Article
%A Das, Ashok
%A Banerjee, Aritra
%A Tayal, Akhil
%A Ali, Mir Sahanur
%A Layek, Rashbihari
%A Karmakar, Srikanta
%A Sinha, Pritam
%A Kumbhakar, Pathik
%A Chattopadhyay, Dipankar
%A Bandyopadhyay, Sudipta
%T Local Structure Distortion in Mn, Zn Doped Cu<sub>2</sub>V<sub>2</sub>O<sub>7</sub>: Supercapacitor Performance and Emergent Spin-Phonon Coupling
%J Advanced materials
%V 37
%@ 0935-9648
%C Weinheim
%I Wiley-VCH
%M PUBDB-2025-01528
%P 2416644
%D 2025
%X Supercapacitors are rapidly gaining attention as next-generation energy storage devices due to their superior power and energy densities. This study pioneers the investigation of Mn/Zn co-doping in 𝜶-Cu<sub>2</sub>V<sub>2</sub>O<sub>7</sub> (CVO) to enhance its performance as a supercapacitor electrode material. Structural and local Structural properties of Mn/Zn co-doped CVO have been investigated through X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), and X-ray Absorption Spectroscopy (XAS), revealing significant distortions that enhance supercapacitor performance. The optimized sample demonstrates a remarkable specific capacitance of 1950.95 Fg<sup>−1</sup>, energy density of 97.54 Whkg<sup>−1</sup>, and enhanced capacitive retention,attributedtotheuniqueCucoordinationenvironmentandimproved charge transfer kinetics. Temperature-dependent Raman spectroscopy unveils spin-phonon coupling (SPC), particularly in VO<sub>4</sub> stretching modes, supported by magnetic measurements that shows a reduction in the Néel temperature and the emergence of zero field-cooled (ZFC) exchange bias (EB). This work is the first to report the impact of local structure distortion on both supercapacitor performance and SPC in CVO, offering a novel strategy for developing high-performance energy storage materials with spintronics potential. In addition, the assembled symmetric optimized supercapacitor shows a high energy density of 93.32 Whkg<sup>−1</sup> and excellent cycling stability. A prototype device incorporating the optimized CVO successfully powers eight commercial LED bulbs, demonstrating its practical application potential.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:39865953
%U <Go to ISI:>//WOS:001442954600042
%R 10.1002/adma.202416644
%U https://bib-pubdb1.desy.de/record/627003